Power Bright 12v 1500 watt power inverter Model# PW1500-12

[mpobanion]

Hello, members
I am having problems with this inverter after it has been repaired. What had happened was 120 volts ac was sent through the inverter backwards while being connected to a photovoltaic systems AC (2) 15amp circuit breaker panel. Smoke came out of the inverter. I replaced all the damaged components, capacitor, all fuses and all transistors. I purchased all same components or equals and installed them. I reassembled the inverter back together. The inverter now turns on, and(with the proper AWG cables connected to a deep cycle battery on the + and -terminals the inverter surges while charging any 120 volt AC electronics. While the inverter is in the on position and when the DC is inverted to AC, at best i get only 33 watts max in this surging back-and-forth on-and-off after inverting to 120 AC to charge any electronic devices. DC to AC, not fast enough cycles per second to keep the inverter at 60cycles 120 volts AC. I would really appreciate any advice if i am missing any procedures or i forgot something simple i was suppose to do. Thanks very much for reading about the problem, Mike

[Behemot]

Re: Power Bright 12v 1500 watt power inverter Model# PW1500-12

There is high possibility the transformer is bad and if not that, than also some feedback components, not only high-power ones you replaced. Post some high-res sharp photos…

[kc8adu]

Re: Power Bright 12v 1500 watt power inverter Model# PW1500-12

part of the chopper still damaged?
does the dc level stay around 170 at the big cap?
what most of these do is boost to 170ish dc and chop to make ac.

[mpobanion]

Re: Power Bright 12v 1500 watt power inverter Model# PW1500-12

The reading on the main cap is 115.3 volts. It is a CapXon 1500uF 200 volts LP vent 85 C Neg. Could the main cap have been weakened by the 120 volts AC applied backwards at the inverters 120 volt AC output plug? If the cap is like your saying should be @ 170 volts DC. The voltage lacking is a difference of 55 volts. This inverter in addition has four large main transistors. The readings on the four main transistors (there are two pairs each, a pair on the positive side (red)AC, the other two are on the neutral side AC (white). They all read the same, half of the 115.3 volts DC (58 volts DC rounded-up). Is this the chopping effect, then the two voltages are brought back-to-gather for the modified sine wave 120 volts AC? that would be very close to 120V AC were the main cap at 170 volts DC? Thanks very, Mike

[mpobanion]

Re: Power Bright 12v 1500 watt power inverter Model# PW1500-12

Hi, this is the highest resolution pix's i could take up to 3M

[mpobanion]

Re: Power Bright 12v 1500 watt power inverter Model# PW1500-12

More hi resolution pix's of PowerBright inverter repair and anymore help would be appreciate. Thanks very much,Mike